There are a lot of parts to the game, including many social aspects, and a large map/world to explore. There are common areas where people hang out and chat, and there are a lot of ways to play games together or against each other (for Bitcoin). Most of it ties into gambling in some form of another.
There are frequently tournaments held in the game, where everyone who enters will play some form of mini-game defined by the tournament rules. There will be a payout at the end from the tournament pot, to whomever the winners of the tournament are.